CN110417076B - Low power module for industrial retrofit vehicle and BMS - Google Patents
Low power module for industrial retrofit vehicle and BMS Download PDFInfo
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- CN110417076B CN110417076B CN201910537431.4A CN201910537431A CN110417076B CN 110417076 B CN110417076 B CN 110417076B CN 201910537431 A CN201910537431 A CN 201910537431A CN 110417076 B CN110417076 B CN 110417076B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
- B60L58/15—Preventing overcharging
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
- H02J7/0032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits disconnection of loads if battery is not under charge, e.g. in vehicle if engine is not running
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Transportation (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The embodiment of the invention provides a low-power-consumption module for an industrial modified vehicle and a BMS (battery management system), and belongs to the technical field of battery management systems. The vehicle comprises a BMS, a battery pack, a controllable switch and a DC/DC converter, wherein the input end of the low-power module is connected with the BMS, the first output end of the low-power module is connected with the first end of the DC/DC converter through the controllable switch, the second output end of the low-power module is connected with the second end of the DC/DC converter, the third output end of the low-power module is connected with the third end of the DC/DC converter, and the fourth end of the DC/DC converter is connected with the BMS; the BMS controls the low-power module to conduct a first end and a third end of the DC/DC converter under the condition that the BMS detects that the battery pack is in an idle state for a long time; and when the first end and the third end of the DC/DC converter are conducted, the DC/DC converter stops working so that the fourth end of the DC/DC converter outputs low level.
Description
Technical Field
The invention relates to the technical field of battery management systems, in particular to a low-power module and a BMS (battery management system) for an industrial modified vehicle.
Background
In the face of increasingly severe energy situation and environmental protection pressure, and opportunities brought by external conditions such as new energy automobile development and the gradual maturity of lithium battery technology, the lithium battery forklift is meeting the best market opportunity. Compared with the traditional lead-acid battery, the lithium battery applied to the forklift has more obvious advantages, firstly, the weight of the counterweight is adjusted to ensure that the gravity center of the whole forklift is lower and the energy is more saved due to small volume and easy arrangement; secondly, because the lithium battery is maintenance-free, a sewer for cleaning acid liquor is not required to be designed on the vehicle body, and acid corrosion resistant materials are not required to be attached to the inner side of the battery pack box; thirdly, the advantage that the lithium battery can be charged quickly is fully utilized, the selection capacity of the storage battery can be reduced, and therefore the relative cost for manufacturing the forklift is effectively reduced.
Under the advantages, the demand for changing lead-acid vehicle types into lithium-ion vehicle types in the market is gradually increased. But the lead-acid vehicle model is limited in that the communication problem between the whole vehicle and the battery system is not considered during the early design, so the integration problem of the lithium battery management system can be encountered in the process of modifying the lead-acid vehicle model into a lithium battery vehicle model, namely: power supply and control problems of the battery management system. The mainstream modification scheme still uses a lithium battery PACK as a single working component (equivalent to a lead-acid storage battery before modification), and a battery management system in the PACK is powered by a DC/DC converter of the PACK. Therefore, a switch is added in the starting process of the whole truck, field workers can always start the DC/DC converter in the PACK due to complicated starting operation steps, and when the forklift is in a long-time non-working condition, the lithium battery PACK of the battery can cause electric quantity reduction and even over-discharge to damage the battery due to the fact that the DC/DC converter carried by the battery PACK works all the time.
Disclosure of Invention
An object of an embodiment of the present invention is to provide a low power module and BMS (Battery Management System) for an industrial retrofit vehicle. This low-power module and BMS can reduce the consumption of industry repacking vehicle.
In order to achieve the above object, an embodiment of the present invention provides a low power module for an industrial retrofit vehicle, the vehicle including a BMS, a battery pack, a controllable switch, and a DC/DC converter, an input terminal of the low power module being connected to the BMS, a first output terminal of the low power module being connected to a first terminal of the DC/DC converter through the controllable switch, a second output terminal of the low power module being connected to a second terminal of the DC/DC converter, a third output terminal of the low power module being connected to a third terminal of the DC/DC converter, a fourth terminal of the DC/DC converter being connected to the BMS;
the BMS controls the low-power-consumption module to conduct a first end and a third end of the DC/DC converter under the condition that the BMS detects that the battery pack is in an idle state for a long time;
and when the first end and the third end of the DC/DC converter are conducted, the DC/DC converter stops working so that the fourth end of the DC/DC converter outputs low level.
Optionally, the low power consumption module opens the first terminal and the third terminal of the DC/DC converter when the controllable switch is switched from the closed state to the open state;
the low-power consumption module conducts the first end and the second end of the DC/DC converter under the condition that the controllable switch is switched from the open state to the closed state, and the DC/DC converter starts to work under the condition that the first end and the second end of the DC/DC converter are conducted, so that the fourth end of the DC/DC converter outputs high level.
Optionally, the low power consumption module includes:
one end of the first resistor is used for externally connecting +12V direct current;
the first input end of the controllable silicon is connected with the other end of the first resistor;
one end of the first capacitor is connected with the first input end of the controlled silicon, and the other end of the first capacitor is connected with the second input end of the controlled silicon;
and the collector of the first triode is connected with the second input end of the controllable silicon, the base of the first triode is connected with the BMS, and the emitter of the first triode is grounded.
Optionally, the controlling, by the BMS, the low power module to turn on the first terminal and the third terminal of the DC/DC converter when the BMS detects that the battery pack is in an idle state for a long time specifically includes:
the BMS outputs a high level signal to the first triode.
Optionally, the low power consumption module further includes:
one end of the second resistor is connected with the first output end of the controllable silicon, and the other end of the second resistor is connected with the first output end of the low-power-consumption module;
the first input end of the optocoupler is connected with the first output end of the silicon controlled rectifier, the first output end of the optocoupler is connected with the first output end of the low-power-consumption module, and the second output end of the optocoupler is connected with the second output end of the low-power-consumption module;
and one end of the third resistor is connected with a second input end of the optocoupler, the other end of the third resistor is connected with a second output end of the controllable silicon, and the other end of the third resistor is also connected with a third output end of the low-power-consumption module.
Optionally, the low power consumption module further includes: and the anode of the diode is connected with the other end of the third resistor, and the cathode of the diode is connected with the third output end of the low-power-consumption module.
In another aspect, the present invention also provides a BMS for an industrial retrofit vehicle, the BMS including the low power module according to any one of the above.
Through the technical scheme, the low-power-consumption module and the BMS for the industrial refitted vehicle, provided by the invention, have the advantages that when the battery pack is detected to be in the idle state for a long time, the DC/DC converter is turned off and the control state of the DC/DC converter is kept, so that the problems of battery capacity reduction, battery damage and the like caused by the fact that the DC/DC converter works all the time when the vehicle is idle are avoided, and meanwhile, the energy consumption of the vehicle is also reduced.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention and do not limit the embodiments. In the drawings:
FIG. 1 is a connection diagram of a low power module for retrofitting an industrial vehicle according to one embodiment of the present invention;
fig. 2 is a circuit diagram of a low power module for retrofitting an industrial vehicle according to one embodiment of the present invention.
Detailed Description
The following describes embodiments of the present invention in detail with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.
In the embodiments of the present invention, unless otherwise specified, the use of directional terms such as "upper, lower, top, and bottom" is generally used with respect to the orientation shown in the drawings or the positional relationship of the components with respect to each other in the vertical, or gravitational direction.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, technical solutions between the various embodiments can be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not be within the protection scope of the present invention.
Fig. 1 is a connection diagram of a low power module for an industrial retrofit vehicle according to an embodiment of the present invention. In fig. 1, the vehicle may include a BMS10, a battery pack BT, a controllable switch K, and a DC/DC converter 20. The DC/DC converter 20 may be used to convert a supply voltage of the battery pack BT to supply power to the BMS 20. The input end of the low power module 30 is connected to the BMS10, the first output end of the low power module 30 is connected to the first end of the DC/DC converter 20 through the controllable switch K, the second output end of the low power module 30 is connected to the second end of the DC/DC converter 20, the third output end of the low power module 30 is connected to the third end of the DC/DC converter 20, and the fourth end of the DC/DC converter 20 is connected to the BMS 10.
The BMS10 controls the low power module 30 to turn on the first terminal and the third terminal of the DC/DC converter 20, in case it is detected that the battery pack BT is in an idle state for a long time;
when the first terminal and the third terminal of the DC/DC converter 20 are turned on, the DC/DC converter 20 stops operating to allow the fourth terminal of the DC/DC converter 20 to output a low level, thereby allowing the DC/DC converter 20 to stop supplying power to the BMS10 without manually turning off the controllable switch K.
When the DC/DC converter 20 needs to be restarted, the controllable switch K may be manually reset (opened and then closed), and the low power consumption module 30 opens the first terminal and the third terminal of the DC/DC converter 20 when the controllable switch K is switched from the closed state to the open state.
The low power consumption module 30 turns on the first terminal and the second terminal of the DC/DC converter 20 in a case where the controllable switch K is converted from the open state to the closed state, and starts to operate such that the fourth terminal of the DC/DC converter 20 outputs a high level in a case where the first terminal and the second terminal of the DC/DC converter 20 are turned on, thereby causing the DC/DC converter 20 to supply power to the BMS10 again.
In this embodiment, a specific structure of the low power consumption module 30 may be, for example, as shown in fig. 2. In fig. 2, the low power consumption module 30 may include a first resistor R1, a thyristor RL, a first capacitor C1, and a first transistor Q1.
One end of the first resistor R1 can be used for externally connecting +12V direct current; a first input end of the controlled silicon RL can be connected with the other end of the first resistor R1; one end of the first capacitor C1 can be connected with a first input end of the controlled silicon RL, and the other end of the first capacitor C1 can be connected with a second input end of the controlled silicon RL; the collector of the first transistor Q1 may be connected to the second input terminal of the thyristor RL, the base of the first transistor Q1 may be connected to the BMS10, and the emitter of the first transistor Q1 may be grounded.
Further, the low power module 30 may further include a second resistor R2, an optical coupler IC1, and a third resistor R3. One end of the second resistor R2 may be connected to the first output end of the thyristor RL, and the other end of the second resistor R2 may be connected to the first output end of the low power consumption module 30; a first input end of the optical coupler IC1 can be connected with a first output end of the controllable silicon RL, a first output end of the optical coupler IC1 can be connected with a first output end of the low-power module 30, and a second output end of the optical coupler IC1 can be connected with a second output end of the low-power module 30; one end of the third resistor R3 is connected to the second input terminal of the optocoupler IC1, the other end of the third resistor R3 is connected to the second output terminal of the thyristor RL, and the other end of the third resistor R3 may also be connected to the third output terminal of the low power consumption module 30.
Still further, the low power module 30 may further include a diode D1. The anode of the diode D1 may be connected to the other end of the third resistor R3, and the cathode of the diode D1 may be connected to the third output terminal of the low power consumption module 30.
Based on the circuit structure of the low power module 30 as shown in fig. 2, in this embodiment, "the BMS10 controls the low power module 30 to turn on the first terminal and the third terminal of the DC/DC converter 20" in case that it is detected that the battery pack BT is in an idle state for a long time, and then the BMS10 may output a high level signal to the first transistor Q1. When the BMS10 outputs a high level to the first transistor Q1, the first transistor Q1 is turned on, thereby turning on the input terminals (the first input terminal and the second input terminal) of the thyristor RL; due to the device characteristics of the controllable silicon RL, under the condition that the input end is connected, the output end is also connected, so that the node U1 is at a low level (the voltage value is not necessarily 0), and at the moment, the first output end and the second output end of the optical coupler IC1 are disconnected, so that the first end and the second end of the DC/DC converter 20 are disconnected; when the first terminal and the second terminal of the DC/DC converter 20 are disconnected, the fourth terminal of the DC/DC converter 20 outputs a low level, thereby stopping power supply to the BMS 10.
The BMS10 outputs a low level to the first transistor Q1 in the case where the power supply is stopped, but the output terminal can maintain a conductive state even though the input terminal is turned off in the state where the output terminal is turned on due to the device characteristics of the thyristor RL unless the voltage of the output terminal is lower than the conductive voltage (generally, 0.5V to 1.5V) of the thyristor RL.
When the BMS10 needs to be restarted, the controllable switch K may be turned off so that the voltage of the output terminal of the thyristor RL (node U1) is lower than the turn-on voltage, thereby turning off the output terminal; after the output end is disconnected, the controllable switch K is closed, so that the voltage of the node U1 is at a high level, and the optocoupler IC1 is switched on; in a case where the photo coupler IC1 is in a conductive state, the first and second terminals of the DC/DC converter 20 are conductive, thereby outputting a high level to the BMS10 to achieve an operation of supplying power to the BMS 10.
In another aspect, the present invention also provides a BMS for an industrial retrofit vehicle, which may include the low power module 30 as in any of the above.
Through the technical scheme, the low-power-consumption module and the BMS for the industrial refitted vehicle provided by the invention close the DC/DC converter and keep the control state of the DC/DC converter when the battery pack is detected to be in the idle state for a long time, so that the problems of battery capacity reduction, battery damage and the like caused by the fact that the DC/DC converter works all the time when the vehicle is idle are avoided, and meanwhile, the energy consumption of the vehicle is also reduced.
Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the embodiments of the present invention are not limited to the details of the above embodiments, and various simple modifications can be made to the technical solution of the embodiments of the present invention within the technical idea of the embodiments of the present invention, and the simple modifications all belong to the protection scope of the embodiments of the present invention.
It should be noted that the various features described in the foregoing embodiments may be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the embodiments of the present invention will not be described separately for the various possible combinations.
Those skilled in the art can understand that all or part of the steps in the method for implementing the above embodiments may be implemented by a program to instruct related hardware, where the program is stored in a storage medium and includes several instructions to enable a (may be a single chip, a chip, etc.) or a processor (processor) to execute all or part of the steps of the method described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk, and various media capable of storing program codes.
In addition, any combination of various different embodiments of the present invention may be made, and the same should be considered as what is disclosed in the embodiments of the present invention as long as it does not depart from the spirit of the embodiments of the present invention.
Claims (4)
1. A low power module for an industrial retrofit vehicle, the vehicle comprising a BMS, a battery pack, a controllable switch and a DC/DC converter, characterized in that an input of the low power module is connected to the BMS, a first output of the low power module is connected to a first terminal of the DC/DC converter via the controllable switch, a second output of the low power module is connected to a second terminal of the DC/DC converter, a third output of the low power module is connected to a third terminal of the DC/DC converter, and a fourth terminal of the DC/DC converter is connected to the BMS;
the BMS controls the low-power module to conduct a first end and a third end of the DC/DC converter under the condition that the BMS detects that the battery pack is in an idle state for a long time;
the DC/DC converter stops working under the condition that the first end and the third end of the DC/DC converter are conducted, so that the fourth end of the DC/DC converter outputs a low level;
the low power consumption module includes:
one end of the first resistor is used for externally connecting +12V direct current;
the first input end of the controllable silicon is connected with the other end of the first resistor;
one end of the first capacitor is connected with the first input end of the controlled silicon, and the other end of the first capacitor is connected with the second input end of the controlled silicon;
a collector of the first triode is connected with a second input end of the controllable silicon, a base of the first triode is connected with the BMS, and an emitter of the first triode is grounded;
the BMS controls the low power module to conduct the first terminal and the third terminal of the DC/DC converter when detecting that the battery pack is in an idle state for a long time, and specifically includes:
the BMS outputs a high-level signal to the first triode;
the low power consumption module further comprises:
one end of the second resistor is connected with the first output end of the controllable silicon, and the other end of the second resistor is connected with the first output end of the low-power-consumption module;
the first input end of the optical coupler is connected with the first output end of the silicon controlled rectifier, the first output end of the optical coupler is connected with the first output end of the low-power-consumption module, and the second output end of the optical coupler is connected with the second output end of the low-power-consumption module;
the other end of the third resistor is connected with a second output end of the silicon controlled rectifier, and the other end of the third resistor is further connected with a third output end of the low-power-consumption module.
2. The low power module of claim 1, wherein the low power module opens the first terminal and the third terminal of the DC/DC converter when the controllable switch is switched from the closed state to the open state;
the low-power consumption module conducts the first end and the second end of the DC/DC converter under the condition that the controllable switch is switched from the open state to the closed state, and the DC/DC converter starts to work under the condition that the first end and the second end of the DC/DC converter are conducted, so that the fourth end of the DC/DC converter outputs high level.
3. The low power module of claim 1, further comprising: and the anode of the diode is connected with the other end of the third resistor, and the cathode of the diode is connected with the third output end of the low-power-consumption module.
4. A BMS for industrial retrofit vehicles, characterized in that the BMS comprises a low power consumption module according to any of claims 1 to 3.
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| CN201910537431.4A CN110417076B (en) | 2019-06-20 | 2019-06-20 | Low power module for industrial retrofit vehicle and BMS |
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| CN201910537431.4A CN110417076B (en) | 2019-06-20 | 2019-06-20 | Low power module for industrial retrofit vehicle and BMS |
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| CN110417076B true CN110417076B (en) | 2023-02-03 |
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